A.O. Smith hybrid water heater shows E24; fan may not run

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Failed fan motor, Obstructed fan blade, Loose fan wiring, Control board fan relay failure

Safety: Disconnect power before removing fan shrouds or guards.

1. Visual inspection: Check the fan blades for obstructions (insulation, plastic, debris). Remove any blockage.
2. Spin test: With power off, spin the fan by hand. It should rotate freely. If stiff or seized, the motor likely needs replacement.
3. Wiring check: Ensure the fan motor connector is fully seated and wires are intact.
4. Replace fan motor: If the motor does not run when commanded and has proper voltage, replace it with an OEM fan motor.

Medium 3/5

Heat Pump Fan Motor

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